The old Margaret Brock Reef lighthouse platform, no longer in use, except by gannets.

Offshore construction sometimes requires large pile driving equipment


Underwater growth on jetty structure

Design in the coastal sphere involves understanding and predicting:

• Varying water levels from tidal action, river flows, storm surges (raising the water area locally due to low atmospheric pressure), wave setup (the average water level in the breaker zone is higher than average water level further out to sea).
• Wave attack from waves breaking on or over the structure resulting in forces very high in magnitude, but short in duration.
• Water currents, which will induce forces on structures, but also move sediments around them.
• Forces from boats berthing or impacting against structures, which vary according to boat size, approach speed and angle and water depth.
• Sand and sediment movement by currents or wave action, resulting in large volumes of sediment relocation over time. This may lead to erosion or accretion in an area, or may fluctuate between both.

We undertake inspections, assessments and design and documentation of structures in these areas:

• Boat ramp facilities  
  
• Coastal Assessment  
• Inspection of Marine Structures  
• Jetties  
• Offshore Structures 

Experience and qualifications are difficult to obtain in this area. All work in this area is undertaken by or overseen by Mr Magryn, who has undertaken the following:

• In addition to the Bachelor of Engineering degree (Civil), he has undertaken a Master of Engineering Science (Coastal Engineering) degree from University of NSW.
• Work with Coastal Branch of Public Works Department of NSW.
• Work with Coastal Branch of Commonwealth of Department of Housing and Construction.
• Work with various private consultancies in South Australia.
• Coastal work with his consultancy since 1994.